Brand N/A Model LM358 Quantity 1 Color Blue Material Plastic + iron Specification Size: 4.6cm x 3.5cm; Main chip: LM358; Input voltage: DC 5V~12V; Input current: >=100mA Features It is used as a square wave signal generator to generate a square wave signal for experimental development use; For generating drive a stepper motor drive of the square wave signal; Generates adjustable pulses for use of MCU; Generates adjustable pulse to control related circuit. Second a brief description: Adjustable frequency range: 0.07Hz~2kHz (ie cycle 0.45 ms to about 15 seconds); Frequency adjustment method: Board has four short cap can select the frequency: Insert 0 shorting cap ( four short cap all off) is the high-frequency file the longest period transferred to 0.3 seconds; Insert a short cap the longest cycle can be transferred to four seconds; Insert two short cap the longest cycle can be transferred to seven seconds; Insert three short cap the longest cycle can be transferred to about 10 seconds; Insert four short cap the longest cycle can be transferred to about 15 seconds; Duty cycle adjustment range: 0% to 100% (high / cycle); Output current: Strip 9012 transistor so that driving ability is relatively strong the output current can go to 500mA the output can directly drive small relays or small motors Application Great for DIY project English Manual/Spec Yes Other Duty cycle and frequency resolution adjustable; With output indicator: LED on when high level LED off when low level; LED flashed when low frequency LED steady on when high frequency. Packing List 1 x Module